Can We Restrict the Access For the Users to Each Tab In Bi Work Space

Hi All

is there any way that we can restrict the Access For the Users to Each Tab in BI Work Space

I had Creates Bi work pace : B

With The Tabs B1 and B2

I have Users U1 and U2

The user U1 Can Only Access B1

       user U2 can Only Access B2

Is there Any way That We can Restrict the Access Tabs In Bi Work Space

Please Advise ,

Thanks

Krishna .